Fireproof door or shutter.



PAWTENTED' JUNE 25. 1907.

H. T. HIGINBOTHAM. FIREPROOF DOOR 0R SHUTTER.

APPLICATION FILED AUG. 23, 1906.

I Al mm UNIT D .sra'rns" PATENT OFFICE.

HENRY IT. HIGINBdTHAM, or. NEW ORLEANS, LOUISIANA.

FI EP'RQOF" DOOR on SHUTTER;-

No. 858,287.- v

Specificationof Letters Patent.

Patented June 25, 1907.

Application filed August 23,1906. serial N 331,813.

it all whom it may concern:

Be it knownthat I, HENRY'T. HIGINBOTH- AM, a,citizen of the United States, residing at New Orleans, in the parish of Orleans and Provide nfimproved construction of device of this character which will embody the characteristics of lightness and strength 1 5' but susceptible to contraction and ex ansionwithout any liability of warping an which.

will be provided with air spaces that will enable t edoor or shutter to successfully withstand a fire no matter upon what sideof the door or shutter the fire might occur.

With this'and'other objects/in view'as will more fully appear as. the description proceedsj, 'theinvention consists in certain constructions, and arrangements of the parts hereinafter describedand particularly pointedout in the appended claims.

For a full description of the invention and the merits thereofand also to acquire a knowledge of the details of construction of the means for efiecting the result, reference .is to be hadto the following description and accompanying drawings, in which:

Figure 1 is a front elevation of a window, illustrating my invention as embodied in a air of hinged shutters, one of said shutters being open and theiinner side'thereof. partially broken away. Fig. 2' is' a horizontal sectional view of one of the shutters. Fig. 3 is a similarview 'ofa portion of one of the o shutters on an'enlarged scale. Fig. 4 is a y ertical sectional viewon .the line {If-a: of

Corresponding and'like parts arereferred to in the following descriptlon and indicated in all the views of the drawings by the same reference characters. 1

The improved door or shutter of my invention com rises three layers of corrugated metal, name y, two outside layers designated a between the other two layers, the corruga tions of the intermediate la er extending obliquely preferably at an ang e of forty-five layers.

-meansof the corrugated strips 6.

1 and 2. the corrugations of which extendlongitudinally, and an intermediate layer 3'- In the preferred construction, the outer layer lis located adjacent the interior of the building when the device, if a shutter, is closed.

Hereinafter therefore, todistinguish the layer 1 from the layer 2 whileboth-are ex-1 teriorfcr outside layers with respect to the layer,3,I shall refer to'the layer 1 asfthe'inner layer, the layer 2 as the outer layer, and the inside layer 3 as the intermediate layer.

Between theinner la er 1' and the intermediate layer 3 a sheet 0 asbestos 4 is placed.

As'shown particularl in Fig. 3, the inner layer 1 is provided wit a flat marginal'ex-7o tension 1, projecting beyond the other layers above mentioned, and to the outer edge "of this marginal extension 1, an-angle iron binding-strip 5 is secured, The outstanding member 5 of the angle iron binding strip'5 7 5 is 'spaced'from the corrugated layers 1, 2 and I 3, and in this space is secured a corrugated strip 6wvith its corrugations extending longitudinally. The strip 6 isalso providedwith a fiat marginal extension, designated 6 said extension being interposed between the main portion of the angle iron binding strip 5 and the extension 1 of theinner layer. 1. The Y opposite edge or margin ,ofthe corrugated str1p.6 is also slightly flattened and is interposed between the main corrugated layers,

a row of. rivets 7 being inserted through each corrugation so as to secure all the corrugated layers together, including one edge of the stripfi, andanother row of rivets 8 being ingo serted through'the main portion or member of the angle iron binding strip 5, throughthe extension 1 of the layer 1 and through the,

interposed marginal extension 6* of the strip e 6. This produces an almost solid door wit three series of air s aces'or channels, namely, a series 'on each side of the diagonally corrugated. intermediate layer 3 and a diagonally extending series lproduced-bysaid intermediate layer 3 an additionto these air channels or spaces, air spaces are provided to extend longitudinally at the margins of the shutter ordoor, by

, From the oregoing description in com1ection with the accompanying drawings, it will be seen thatfth e construction produced by my invention will allow a free circulation. of draft 'thatwill keep eachlayer cool in the event of a fire against either's1de of the shut- 1. 10

" ter or door,jand the angleiron 5' will. revent he deer j r-s j twr'fi m War g w the asbestos sheet'4. In I jury thereto, and the entirestructure will be practically Slld, 'Wl] ll6 at the same time it will combine the characteristics of lightness with durability.

While the accompanying drawings illustrate my invention as embodied in a pair of hinged shutters, itis obvious that it is not limited thereto, as it is equally applicable to sliding. shutters and doors.

Having thus described the invention, what is claimed as new is:

1. The herein described fire proof closure, consisting of an inner layer and an outer layer both of which are corrugated and have their corrugations extending longitudinally, an intermediate corrugated layer, the corrugations of which extend obliquely to the corrugations of the other two layers, and an asbes- 'tossheet interposed between the inner layer and the intermediate layer, whreby there are produced three intermediate series of air channels namely, the longitudinally extendlng series between the outer layer and the in termediate layer, the longitudinally extendmg series between the asbestos sheet and the inner layer,and the obliquely extending se ries between the asbestos sheet and the intermediate layer.

12. The herein described fire proof closure, comprising corrugated layers, one of which is 'rovided with marginal extensions, angle ars secured. to said extensions, and corrugated strips secured to said angle bar and marginal extensions and lying between the angle bar and the corrugated layers.

eraser 3. The herein described improved fireproof closure, comprising corrugated layers, one of which is provided with flat longitudinal extensions, angle bars secured to said extensions with one member outstandiiv therefrom, and corrugated strips located in the space between. said outstanding members of the angles and the said corrugated. layers, said corrugated strips being also provided with flat marginal extensions interposed between the angle bars and thefirst named marginal extensions.

4. The herein described improved fire proof closure, comprising corrugated layers, one of which is provided with fiat longitudinal extensions, binding strips secured to said extensions, and corrugated strips located between said binding strips and the said corrugated layers and secured to the latter and to the said fiat extension of one of said layers.

5. The herein described fire proof closure, comprising corrugated layers, one of which is rovidedwith marginal extensions and spaced From the main portion of the corrugated layers, and corrugated strips provided with side edge extensions, one of which is interposed between the adjacent binding strip and the marginal extension of one of the corrugated layers, and the other of which is interposed between the marginal extension of one of the layers and the edges of the other layers.

In testimony whereof I affix my signature in presence of two witnesses.

HENRY r. ineimiorniii. [1,. 8.] ivitnesses GEORGE W. SHERMAN, HENRY C. Gauss. 

